@0xedd1e
Hi I also looked at the release notes to see
if something with Future/Concurrent was changed but nothing popped up.

Worth trying going back to using earlier versions of QT?

Well for test. it would be a good test if exact same code just works in say 5.6
and not in 5.10. But being stucked at 5.4 would be not so optimal.

A note about the static.
Just to be sure. the class that expects the Finished signal is a static member of some other class?
As far as i can recall, you cant compile if you try to connect to a static class slot so im inclided to
say that is not the issue.

Since your mini sample works. There must be some difference in the real code. But i cant
think of more to check.

Actually you should think about the need of signals and slots in this particular case - maybe it will be much easier and faster to directly call a method from the other class instead of emitting a signal? Signals/slots are useful if you want to have loose coupling, so the sender does not need to know anything about receiver.

@Ni.Sumi my prolem is that I am using qmouse event to display coordinates on a widget but I want it only when the cursor is on a specific widget . even thought my connect signals is on that widget the function that shows the coordinates is still active outside that widget and it show random usles stuff